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" @garten tstrs' @anni @Hire IMPROVBD EXTENSION-HORSE.

@te tlgehule retentit tu intime letters ziinit :uit milking part nt In:ma.

T0 ALL WHOM IT MAY'CONCERN: 4

Be it known that I, 4R. HAMMILL, of'hl'ineral'loint, Iowa county,Wisconsin, have invented a new and improved Extension-Horse; and I dohereby declare that the following is a full, clear, andy exactdescription thereof, which will enable others skilled in the art to makeand use the same, reference beingr had to the accompanying drawings,forming part 'of this specification, in which- I Figur l represents aside elevation of my improved extension-horse, when the same iscontracted. Figure 2 is a. side elevation ofthe same, showing itext-ended. Figure 3 is an end elevation of the same. l Figure t is adetail vertical cross-section on an enlarged scale, the `plan of sectionbeing indicated by line` x :ig-fig. 1.

Figure il is a detail horizontal sectional View, taken on the line g/ y,figs.,1 and 2..' Similar letters of referenceeindicate correspondingparts. This invention relates to a. horsc'or trestle which is used bymasons, Plasterers, and others, for supporting scetl'olds, ne.; and 4itconsists in so constructingithe same that it can bc raised or lowered,lengthened or shortened, and folded together, as may be'desired, so thatit will be adaptable for all purposes, and can, when made `of one siz'e,be extended to the very largest dimensions. A very convenient andpractical instrument is thus made, and. as it will `combine in oneallthe sizes for which horses or trestles may be used, it will save Iagreat expense tolall who .would otherwisemeed a number of diYerent-sizcdarticles. That it can be folded together for transport-ation and storingwhen not used is another great advantage of this invention. A Arepresent'the legs of the trestle, and B B are the main beam of thesame. The beam B'consists of two beams, which are connected by strapsafa, of which one is rmly attached to the innerend of each beamV andsurrounds the other beam, thus connecting the two beams, but allowingthem to slide so 'as to lengthen or shorten the-beam as much as desired.Between the portionsof the-beaded? is placed into grooves g,g. 5, whichare arranged in the inner sides of the said portions, a'movable tongueor feather, 1.,-on each end of which a pin, z', Vis arranged, whichprojects into that groove g, in which that end of the tongue slides.Across these grooves are arranged stops lc k, against which the pins z'z' strike when the beam B is extendedto its greatest extent, and whichin combination with the bands a prevent the two portions ot' tho beamfrom beingseparated altogether, To each end of the double bee-Sn B aresecured two legs,A A, by means of pins b bf These pins are well showniniig. 4. Each of them is provided with a head. The body is flat andslotted, the slot being closed at 'both ends, making the whole pinresemble a. staple, the two ends of which'are secured inlthe head. Whenthe beam is extended, as in gs. 2 and 5, the tongue histrengthens theconnections ofthe two parts of'q the beam, l and keeps them in line, andprevents the centre of the beam from` being depressed by a weight orfrom someother cause. The beam is provided with holesout through it, onefor the reception of. each pin b. A staple, c, is securedv in each ofthese holes, and passes around one of the arms oft-he slotted -pinthrough the slot in the same, as is clearly. shown in tig. 4; Each pinpasses through the upper ends'of bothlegs A, and through the end of thebeam B, and a key, d, inserted between the end of the pin TJ and thesideof one leg, A, through the slot in the pin, holds theparts together andthe legs in position. By removing the key d `the Vpin 'can be drawnback, as shown by red'lines inv ig.`4. By the staple c the pinsareprevented 4from being altogethera removed, es well as the legs A, butthe legs can be'folded tothe beam, it' desired, as soon as the keys aretaken out. To each leg A .are secured two metalebands, e e, which are4large Aenough to surrounded extension leg, D, o A which one isprovidedto each leg A.- The said extension lg is perforated 'with a. number ofholes, and a pin, f, pnssinglthrough one oi' these holes and 4throughthe leg A, holds 4the extension leg in any desired position.. To makethe horse answer for great weights as well as for ordinaryplesterersuse, different lengths of extensionlegs D may be provided for eac-h;treetle. Thus tue height of the apparatus canbe easily regulated. To theunder side of eff-.ch band or strep ,alie hinged r. brace, C, the lowerend of which is hooked into a cross-brace, E, which is arranged between.tw-o legs A, on either end of' the trestle. Y The brace is applied tothe Ainner end of one-half of the beam B, towhich the' legsier'e rinlyscented bythe pins bywith which logs the brace connects the end or" 'theboem sc that these.braoes 'do' not interfero'with the cxtensioniorcontractiony utf the beam. One end' of cach of the crcseshracesE-ishin'geljto .thei'uppr bond e, on one of a pair of legi,

n 65,6063 il A, 'and hooks into a ring oi' eye-fon the opposite band onthe other leg of the same pair. When to be folded up the braces C arefirst unhooked and are folded'to the beam. The braces Epare then alsounhooked and folded to the legs to whehthey are hinged. Tho pinsf arethen taken out of the legs 'A and D, and the extension legs are drawnin`so as to be alongside the legs A.; then the key-ssd are taken out andthe legs folded'to the beam, and the whole horse is completely foldedup, but may he set upA again in a very short time. The pins f and. thekeysaluare attached to the beam and legs A, respectivelyby small chainsor strings, so that they I claim asnew, andvdesire to seeurc by LettersPatent-1V 1. The manner of attaching the folding legs A A to the beam Bof a horse or trestle, by means of slotted plus b, staples c, and keysd, all made and operating substantially aslherein shown and described.

l2. The extension' beam B, in combination with the legs A D, all madeand operating substantially es herein shown and described; 1

ad'legs, if desired, as setforth.

, tially as set forth. v

3, AThe braces 'C -and E, in combination with the legs A and beam B,madevso as to be folded to the healn 4. Connecting and supportingtheinner ends of the'two-hal've's of the extension beam rby means o`f-band8a, and av'tongue, L, which is provided-with pins z', and which iseoni-ned'in grooves .g between stops gsubstarb 5. An extension andfolding horse or trestlepmade and operating substantially as hereinshown and describedn The above specification of my invention signed byme this 19th day of March, 1867-. v

I RICHARD HAlVIIVlILL.v

Witnesses:

THOMAS EUsTAo'n, M. I. Mmes..

